JPH0364384B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to the structure of an easy-to-open lid in which a cover piece (hereinafter referred to as a seal tab) is heat-sealed, and a method for manufacturing the same, and more specifically, the invention relates to an easy-to-open lid that is heat-sealed with a cover piece (hereinafter referred to as a seal tab) and a method for manufacturing the lid. ,
It is an object of the present invention to provide an easy-to-open lid that does not lose its function as a product before opening and has excellent appearance, and a method for manufacturing the lid.

(Problems to be solved by the prior art and the invention) The easy-to-open lid currently in use has a spout hole provided in the container lid plate, and the spout hole and its surroundings are covered to seal the spout hole. In many cases, the sealing tab used is aluminum foil, so the aluminum foil is thinly rolled.
When heated for adhesion to a container lid plate, the knob that is free and extends from the adhesive part may warp upwards. Especially when resin is laminated on the outer surface, the heated resin shrinks when cooled. Warping is further accelerated and the product is reversed, resulting in a significantly poor appearance as a product. Furthermore, stacking lid plates with bent or inverted tabs tends to cause bending, which not only reduces the product value, but also causes the seal tab to tear from the bent part when you try to open it. There is a possibility that it will not be possible.

On the other hand, to adhere the seal tab to the container lid plate,
For example, a sealing tab is punched out from an aluminum foil base plate with a heat-sensitive adhesive layer applied to the back side, and then placed on a cover plate holder and placed on the heated cover plate with the heat-sensitive adhesive layer on the bottom side. Generally, the seal tab is lowered into contact with the adhesive, and the adhesive is heated and heated by applying pressure with a seal punch to bond the adhesive.

Since the temperature of the adhesive does not rise enough and the adhesive layer does not bond completely when heated and pressed once, the adhesive layer is heated and pressed several times using a seal punch, which is repeated during conveyance on the line. However, the position of the spout hole may shift during transportation, causing the lid to roll around, and the seal punch and seal tab must be aligned each time in each process, which is a complicated process that requires a lot of gluing work. It is becoming.

In this way, the punch and the seal punch are usually provided in separate processes to perform different functions (the punch performs a punching function and the seal punch performs a pressurizing function).

However, it is very disadvantageous to have the seal tab punch and the seal punch perform separate functions in order to align the cover plate and the seal tab, avoid increasing the number of steps, and so on.

Therefore, the inventors of the present invention focused on making the seal tab punch punch function as a seal punch that heats and presses the seal tab, and as a result of repeated experiments, the seal tab punch punch was able to remove the heat from the cover plate, which is heated during pressing. The temperature increases due to heat conduction, and as the temperature rises, it expands, reducing the fit with the die blade (cutter clearance), or even causing the blade to interfere and spill, or reducing hardness and reducing cutting power. It has been found that punching becomes impossible if the heating temperature of the punch exceeds the limit because the punch temperature decreases.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide an easy-to-open lid that does not lose its function as a product before opening and has an excellent appearance, and a method for manufacturing the same. .

(Means for solving problems) The above object is achieved by the following means.

(1) A container lid plate having a spout hole, and a covering that is adhered to the container lid plate with a heat-sensitive adhesive layer so as to cover the spout hole and its surroundings, and seals the spout hole. an easy-to-open lid consisting of a container lid plate, a knob part extending and free from an adhesive part of the covering piece of the heat-sensitive adhesive layer bonded to the container lid plate; and a container lid plate and the knob part. An easy-to-open lid characterized in that a partial adhesive layer having the same dots or lines as the heat-sensitive adhesive layer is provided between the above-mentioned heat-sensitive adhesive layer.

(2) A container lid plate having a spout hole, and a covering that is adhered to the container lid plate with a heat-sensitive adhesive layer so as to cover the spout hole and its surroundings, and seals the spout hole. In the easy-to-open lid consisting of a single piece, a knob part extending and free from the bonded part of the covering piece of the heat-sensitive adhesive layer bonded to the container lid plate is placed approximately in the center of the container lid plate. and the spout hole is arranged at a predetermined interval from the periphery in a radial line from the center of the container lid plate to the periphery, and the boundary between the adhesive part and the knob part has an arc shape centered on the center of the lid plate. An easy-to-open lid characterized by:

(3) A container lid plate having a spout hole, and a covering that is adhered to the container lid plate with a heat-sensitive adhesive layer so as to cover the spout hole and its surroundings, and seals the spout hole. an easy-to-open lid consisting of a container lid plate, a knob part extending and free from an adhesive part of the covering piece of the heat-sensitive adhesive layer bonded to the container lid plate; and a container lid plate and the knob part. an easy-to-open lid having a partial adhesive layer in the same dots or lines as the heat-sensitive adhesive layer, or a container lid plate having a pouring hole, and a container lid plate having a spouting hole, An easy-to-open lid consisting of a covering piece that is adhered to a container lid plate with a heat-sensitive adhesive layer covering the periphery and sealing the spout hole, wherein the heat-sensitive adhesive layer is adhered to the container lid plate. A knob extending free from the adhesive part of the covering piece of the adhesive layer is arranged approximately at the center of the container lid plate, and the spout hole is arranged radially from the center of the container lid plate to the periphery. In order to manufacture an easy-to-open lid, which is arranged at a predetermined interval from the periphery, and the border between the adhesive part and the knob part is in the shape of an arc centered on the center of the lid plate, the cutting edge on the periphery is left on the bottom surface. A covering piece is punched out from an original plate with a heat-sensitive adhesive layer on the back side using a punch having a heat insulating material layer, and then the covering piece is lowered onto the upper surface of a container lid plate on a pedestal heated by the punch. A method for manufacturing an easy-to-open lid, which comprises pressing the covering piece until it is brought into contact with the upper surface of the lid plate, heating the heat-sensitive adhesive of the covering piece to raise its temperature, and pressing the covering piece until it adheres to the upper surface of the lid plate.

(4) A container lid plate having a spout hole, and a covering that is adhered to the container lid plate with a heat-sensitive adhesive layer so as to cover the spout hole and its surroundings, and seals the spout hole. an easy-to-open lid consisting of a container lid plate, a knob part extending and free from an adhesive part of the covering piece of the heat-sensitive adhesive layer bonded to the container lid plate; and a container lid plate and the knob part. an easy-to-open lid having a partial adhesive layer in the same dots or lines as the heat-sensitive adhesive layer, or a container lid plate having a pouring hole, and a container lid plate having a spouting hole, An easy-to-open lid consisting of a covering piece that is adhered to a container lid plate with a heat-sensitive adhesive layer covering the periphery and sealing the spout hole, wherein the heat-sensitive adhesive layer is adhered to the container lid plate. A knob extending free from the adhesive part of the covering piece of the adhesive layer is arranged approximately at the center of the container lid plate, and the spout hole is arranged radially from the center of the container lid plate to the periphery. When manufacturing an easy-to-open lid, the adhesive part and the tab are arranged at a predetermined distance from the periphery, and the boundary between the adhesive part and the knob part is an arc shape centered on the center of the lid plate. Apply and form a heat-sensitive adhesive layer in the exact shape of the part to be adhered to the side surface, press the entire surface of the covering piece using a seal punch larger than the covering piece, and attach the covering piece to the container lid. A method for manufacturing an easy-to-open lid characterized by heat-adhering it to the top surface of a board.

(Function) In the easy-to-open lid of the first invention, there is provided a heat-sensitive adhesive layer that covers the spout hole and its surroundings between the covering piece that seals the spout hole of the lid plate and the lid plate; Since the same adhesive layer is provided in dots or lines between the knob of the covering piece and the lid plate, it is easy to position the covering piece in a non-tacky state before heating.
After being heated during adhesion, the free knob part due to cooling shrinkage acts as a boundary of the bonded part and prevents it from warping upward.

In the easy-to-open lid of the second invention, the knob of the covering piece is arranged approximately in the center of the container lid plate, the spout hole is arranged radially from the center of the lid plate to the periphery at a predetermined interval from the periphery, and the adhesive part and By forming the border of the knob into an arc shape centered on the center of the cover plate, the peeling force is concentrated on both ends of the border when the covering piece is peeled off. Furthermore, there is no need to position the cover plate during pressing, which simplifies the pressing work.

According to the third aspect of the invention, the cutting edge of the punch for punching out the covering piece from the original plate having the heat-sensitive adhesive layer on the back side is left, and the lower surface is made up of the heat insulating material layer, so that the punched out covering piece is Even when pressed until it adheres to the top surface of the cover plate, the heat conduction from the cover plate to the punch is kept to a minimum, reducing the thermal expansion of the cutting edge, and the punch for punching the cover piece also serves as a pressurizing effect on the cover piece. However, the punching operation will not become impossible.

According to the fourth invention, a heat-sensitive adhesive layer having the exact shape of the part required for adhesion is applied to the back surface, and the entire surface of the covering piece is pressed using a seal punch larger than the covering piece. Since the pieces are adhered to the upper surface of the cover plate, there is no need to align the covering pieces with the seal punch, and the places where adhesion is required are always adhered.

(Example) The present invention will be further explained based on an example shown in the drawings.

Embodiment 1 FIG. 1A is a plan view showing an example of the easy-to-open lid of the present invention (1), FIG. FIG. 2 is a longitudinal cross-sectional view of the cylindrical container showing a state in which the seal tab of the lid has been peeled off.

In the figure, 1 is a container lid plate, and 2 is a pouring hole. The container lid plate can be manufactured from an aluminum plate, a tin plated steel plate, a stain-free steel plate, etc., and in this example, it is an aluminum plate. Reference numeral 3 denotes a seal tab, which can be manufactured from aluminum foil, a synthetic resin thin plate, a thin iron plate, paper, or a composite material thereof. In this example, the seal tab is made of aluminum foil and is laminated with a resin coating 4. As is clear from the figure, the seal tab 3 is attached to the heat-sensitive adhesive layer 5 at the spout hole 2 and its surrounding area 2'.
At the same time as the adhesive part 3' which is thermally adhered to the container lid plate 1 by the adhesive part 3', a part 3' of the knob part 3'' which extends from the adhesive part 3' and is free is At a position between the peeling line and the tip of the knob 3'', an adhesive layer 5 is also provided in a spot parallel thereto, and is adhered to the container lid plate 1, thereby allowing the reversal of the knob 3'' and Prevents bending.

In addition, the adhesion area of the adhesive layer 5 of the knob 3'' is such that it prevents the knob from inverting or bending.
It is set to a level that does not cause any problem in peeling off when opening.

Therefore, the appearance of the product will not be deteriorated, and even if the lid plates 1 are stacked, the knob 3'' will not bend, so when the knob 3'' is pinched and pulled off to open the There is no fear that the product will lose its functionality before the seal tab tears and opens.

In FIG. 1C, 6 is a cylindrical container with a container cover plate 1 wrapped around it, and 7 is a cap that covers the spout hole 2 after opening by peeling off the seal tab 3.

Embodiment 2 FIG. 2 is a plan view showing an example of the easy-to-open lid of the present invention (2).

This example differs from Example 1 with respect to the arrangement of the pouring hole 2 of the container lid plate 1.

The figure shows the spout hole 2 of the container lid plate 1, and the radiation 1 from the center of the container lid plate 1 to the periphery 8 (counter sink wall).
1, the adhesive layer 5 is sandwiched on the periphery 2' of the spout hole 2, and the adhesive part 3' of the seal tab 3 is overlapped with the lid plate 1. The seal punch 9 having a circular hole 10 that does not press the seal tab 3 in the center is pressed.

That is, in this example, there is no need for angular alignment of the seal tab 3 and the seal punch 9, and the seal punch 9 is attached to the cover plate 1 regardless of the angle of the seal tab 3.
Since it is only necessary to press the center of the holder, the work is extremely easy.

Further, even when heating and pressurizing is repeatedly performed during transportation, the adhesive can be reliably bonded even if the lid is rotated.

Furthermore, since the peeling line of the adhesive portion 3' follows the arc shape of the circular hole 10, the peeling force can be concentrated on both ends of the peeling line during peeling, so that the seal tab 3 can be easily peeled off.

Example 3 This example relates to the manufacturing method of the above two lids (1) and (2).

That is, in the present invention (3), as shown in FIG. 3, which is a longitudinal cross-sectional view of the punch, the cutting edge a at the peripheral edge of the punch is hollowed out, and the inside b is hollowed out, and the inside b is filled with a heat insulating material. (for example, silicone rubber), and if necessary, an airway c is provided inside the blade, and cold air is sent into the airway c to cool the cutting edge.

As a result, even if the punch is used as a sealing punch, the thermal influence from the cover plate 1 is minimized due to the small heat conduction part of the punch, so there will be no trouble due to the temperature rise of the punch. At the same time, the heat supplied to the cover plate 1 is not absorbed by the punch, so that the temperature of the heat-sensitive adhesive layer is efficiently heated and bonding is performed quickly and reliably.

Furthermore, since the punch can also be used as a seal punch, the number of steps can be reduced accordingly. Moreover, when no heat is applied to the back side, the seal tab can be punched out using a die and a punch from a thin base plate coated with a heat-sensitive adhesive that has no tackiness when no heat is applied. Since it can be bonded by pressing the seal tab, the punched seal tab can be reliably bonded by simply aligning the punch and the spout hole position of the lid plate without using any special positioning means.

Example 4 This example shows another manufacturing method for the above two lids (1) and (2).

In order to adhere the seal tab 3 to the container lid plate 1, the seal tab is punched out from the aluminum foil original plate using a punch in the first step, and the seal tab is immediately lowered and brought into contact with the heated lid plate, and then pressed with the punch. As described in Example 3, the adhesive layer is heated to raise its temperature to bond the seal tab onto the lid plate, but the punch in the first step is the work of punching out the seal tab from the original aluminum foil sheet. The main task is to press the seal tab onto the heated lid plate for a long time, and this process alone is sufficient to perform the seal punching task. This should be avoided as it may cause trouble to the work; therefore, as the line progresses, the process of repeatedly pressing the seal tab onto the lid plate with a seal punch is repeated in subsequent processes until the adhesion work is completed. is desirable.

In this case, it is necessary to ensure that the seal tab and the lid plate are bonded securely in the areas where bonding is required, and not at all in areas where bonding is not required. It is necessary to align the seal tab with the seal tab, which complicates the work. To do this, apply a wide layer of adhesive to the side of the seal tab facing the lid plate, and then press the seal tab with a seal punch with a pressing area that covers only the areas required for adhesion from the surface of the seal tab. This is because the adhesive is bonded by heating and raising the temperature.

Therefore, in the present invention, only an adhesive layer having the exact shape of the part required for adhesion is applied to the side of the seal tab facing the lid plate, and a circular adhesive layer that fits snugly within the periphery of the lid, which is larger than the seal tab, is formed. By pressing the entire surface of the seal tab using a seal punch, the temperature of the adhesive on the seal tab is increased to complete adhesion.

According to the present invention, it is not necessary to align the seal tab and the seal punch at all, making the work extremely easy. In addition, the present invention has the advantage that necessary areas are always bonded and unnecessary areas are never bonded. In this case, if an undercoat is applied to the part of the back surface of the seal tab where there is no adhesive layer, it is effective to ensure that there is no adhesive in this part and to prevent rusting.

(Effects) Effects of invention (1) When the covering piece is heat-bonded to the container lid plate, the free knob extending from the bonded part may warp or turn over, causing problems in the appearance of the product. In addition, when the lid plate is stacked with the handle upside down, the handle will not bend and the product will not tear at the bent part before being opened, thus maintaining the functionality of the product. can.

Effect of invention (2) When pressing a covering piece, as long as the center of the cover plate and the center of the seal punch are aligned, the covering piece can be pressed no matter what angle it faces, making the pressing work extremely easy. There is a certain effect.

Effect of invention (3) Since the heat conduction part of the punch is made small, the influence of heat from the cover plate is minimized, and thermal expansion due to temperature rise of the punch can be prevented, so the punch can be used also as a sealing punch, and therefore, Increase in process steps can be avoided.

Effects of invention (4) When pressing the covering piece, there is no need to align the covering piece with the seal punch at all, and only the necessary areas can be bonded by pressing the entire surface, making the pressing work extremely easy. can do.

[Brief explanation of drawings]

FIG. 1A is a plan view showing an example of the easy-to-open lid of the present invention (1), FIG. 1B is a cross-sectional view taken along line A-A in FIG. FIG. 2 is a plan view showing an example of the easy-to-open lid of the present invention (2); FIG. FIG. DESCRIPTION OF SYMBOLS 1... Container lid plate, 2... Pour hole, 3... Seal tab, 4... Resin film, 5... Adhesive layer, 6...
Cylindrical container, 7...Cap, 8...Counter sink wall, 9...Seal punch, 10...Punch hole, 11...Radiation, a...Blade edge, b...Insulating material, c...Airway.

Claims (1)

[Scope of Claims] 1. A container lid plate having a spouting hole, and a layer of heat-sensitive adhesive bonded to the container lid plate so as to cover the spouting hole and its surroundings, and sealing the spouting hole. an easy-to-open lid consisting of a covering piece that is attached to the container lid plate; An easy-to-open lid characterized in that a partial adhesive layer having the same dots or lines as the heat-sensitive adhesive layer is provided between the handle and the knob. 2. A container lid plate having a spout hole, and a covering piece that is adhered to the container lid plate with a heat-sensitive adhesive layer so as to cover the spout hole and its surroundings, and seals the spout hole. In the easy-to-open lid, a knob extending free from the bonded portion of the covering piece of the heat-sensitive adhesive layer bonded to the container lid plate is arranged approximately in the center of the container lid plate. , and the spout hole is arranged at a predetermined distance from the periphery in a radial line from the center of the container lid plate to the periphery, and the boundary between the adhesive part and the knob part is in the shape of an arc centered on the center of the lid plate. An easy-to-open lid characterized by: 3. A container lid plate having a spout hole, and a covering piece that is adhered to the container lid plate with a heat-sensitive adhesive layer so as to cover the spout hole and its surroundings, and seals the spout hole. An easy-to-open lid comprising: a knob that extends and is free from the bonded portion of the covering piece of the heat-sensitive adhesive layer that is adhered to the container lid plate; An easy-to-open lid having a partial adhesive layer in the same dots or lines as the heat-sensitive adhesive layer between them, or a container lid plate having a spout hole, and the spout hole and its surroundings. An easy-to-open lid comprising a covering piece that is adhered to the container lid plate by a heat-sensitive adhesive layer so as to cover the spout hole, and the covering piece seals the spout hole, wherein the heat-sensitive adhesive is adhered to the container lid plate. A knob extending free from the bonded part of the covering piece of the agent layer is arranged approximately at the center of the container lid plate, and the spout hole is radially arranged from the center of the container lid plate to the periphery. In order to manufacture an easy-to-open lid in which the boundary between the adhesive part and the knob part is in the shape of an arc centered on the center of the lid plate, insulation material is placed on the bottom surface while leaving the cutting edge on the periphery. A covering piece is punched out from an original plate with a heat-sensitive adhesive layer on the back side using a punch having a layer, and then the covering piece is lowered and brought into contact with the upper surface of a container lid plate on a heated pedestal with the punch. 1. A method for manufacturing an easy-to-open lid, characterized in that the heat-sensitive adhesive on the covering piece is heated to raise the temperature and the covering piece is pressed until it adheres to the upper surface of the lid plate. 4. A container lid plate having a spout hole, and a covering piece that is adhered to the container lid plate with a heat-sensitive adhesive layer so as to cover the spout hole and its surroundings, and seals the spout hole. An easy-to-open lid comprising: a knob that extends and is free from the bonded portion of the covering piece of the heat-sensitive adhesive layer that is adhered to the container lid plate; An easy-to-open lid having a partial adhesive layer in the same dots or lines as the heat-sensitive adhesive layer between them, or a container lid plate having a spout hole, and the spout hole and its surroundings. An easy-to-open lid comprising a covering piece that is adhered to the container lid plate by a heat-sensitive adhesive layer so as to cover the spout hole, and the covering piece seals the spout hole, wherein the heat-sensitive adhesive is adhered to the container lid plate. A knob extending free from the bonded part of the covering piece of the agent layer is arranged approximately at the center of the container lid plate, and the spout hole is radially arranged from the center of the container lid plate to the periphery. When manufacturing an easy-to-open lid in which the adhesive part and the tab are arranged at a predetermined interval from the periphery, and the boundary between the adhesive part and the knob part is an arc shape centered on the center of the lid plate, A layer of heat-sensitive adhesive in the exact shape of the area required for adhesion is applied to the surface, and a layer larger than the covering piece is coated.
A method for producing an easy-to-open lid, characterized in that the entire surface of the covering piece is pressed using a circular sealing punch that fits snugly into the periphery of the lid, and the covering piece is heat-bonded to the upper surface of a container lid plate.